html {
    background-color: #f2f2f2;
    color: #666;
}
.layui-card-header{font-weight: bold;}
.layui-form-item > .required:after {
    content: '*';
    color: red;
    position: absolute;
    margin-left: 4px;
    font-weight: bold;
    line-height: 1.8em;
    top: 6px;
    right: 5px;
}
.install {
    padding: 20px;
    background-color: #F2F2F2;
    margin: 0 auto;
}